What age do you think a flat spot on baby's head will likely stay there? DS has a flat spot right in the middle of the back of his head. We were always monitoring it through all his appointments and dr. Said it was never bad enough for referral/helmet/etc. and recommended more tummy time and working on positioning. He was also a great night sleeper early on so spent months sleeping 12 hours on his back.

Anyway, he's almost 8 months and mostly sleeps on his tummy, and is really only on his back for diaper changes. He's already in a convertible seat which is way more upright than the infant car seat and we aren't in the car or stroller a lot. The spot is still really noticeable to me at least. Is there any hope at this point that it will round out?